压缩系统过失速过程的数值模拟

基于描述轴流压气机及其系统的动态气动响应的一维非定常数学模型,通过数值求解,即可对系统的过失速过程进行数值模拟。以一台三级压气机为算例,数值模拟了发生于该系统中的喘振和旋转失速现象

DIGITAL SIMULATION OF POST-STALL BEHAVIORS OF A COMPRESSION SYSTEM

The post-stall behaviors,such as surge and rotating stall,of a three-stage compressor are simulated based on an one-dimensional unsteady model for the dynamic response of compression system.The variations of the annular average parameters,i.e.velocity,pressure,temperature and flow coefficient,can be obtained from the simulation.The stall types can be identified by these parameters vs.time.In addition,the effect of parameter "B",proposed by E.M.Greitzer,is analyzed.Key Words Axial compressors Stall Digital simulation and peptic ulcers, probably causing gastric cancer. With many characteristics, this organism colonizes the surface of the human stomach and worldwide transmits from human to human via the fecal oral or the oral oral route. Several kinds of methods are currently available for diagnosis of H.pylori infection and isolation of H.pylori . Some measures of treatment and prevention are necessary to decline the incidence of H.pylori infection and upper gastrointestinal tract disease.